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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/config/dbus-core.c | |
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Checked in the following released items:
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ttf-bitstream-vera-1.10.tar.gz
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font-sun-misc-1.0.0.tar.gz
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font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
font-mutt-misc-1.0.0.tar.gz
font-misc-misc-1.0.0.tar.gz
font-misc-meltho-1.0.0.tar.gz
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font-jis-misc-1.0.0.tar.gz
font-isas-misc-1.0.0.tar.gz
font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz
Diffstat (limited to 'xorg-server/config/dbus-core.c')
-rw-r--r-- | xorg-server/config/dbus-core.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/xorg-server/config/dbus-core.c b/xorg-server/config/dbus-core.c new file mode 100644 index 000000000..b349c6e3c --- /dev/null +++ b/xorg-server/config/dbus-core.c @@ -0,0 +1,248 @@ +/* + * Copyright © 2006-2007 Daniel Stone + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Author: Daniel Stone <daniel@fooishbar.org> + */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#define DBUS_API_SUBJECT_TO_CHANGE +#include <dbus/dbus.h> +#include <sys/select.h> + +#include "config-backends.h" +#include "dix.h" +#include "os.h" + +/* How often to attempt reconnecting when we get booted off the bus. */ +#define RECONNECT_DELAY (10 * 1000) /* in ms */ + +struct dbus_core_info { + int fd; + DBusConnection *connection; + OsTimerPtr timer; + struct config_dbus_core_hook *hooks; +}; +static struct dbus_core_info bus_info; + +static CARD32 reconnect_timer(OsTimerPtr timer, CARD32 time, pointer arg); + +static void +wakeup_handler(pointer data, int err, pointer read_mask) +{ + struct dbus_core_info *info = data; + + if (info->connection && FD_ISSET(info->fd, (fd_set *) read_mask)) { + do { + dbus_connection_read_write_dispatch(info->connection, 0); + } while (info->connection && + dbus_connection_get_is_connected(info->connection) && + dbus_connection_get_dispatch_status(info->connection) == DBUS_DISPATCH_DATA_REMAINS); + } +} + +static void +block_handler(pointer data, struct timeval **tv, pointer read_mask) +{ +} + +/** + * Disconnect (if we haven't already been forcefully disconnected), clean up + * after ourselves, and call all registered disconnect hooks. + */ +static void +teardown(void) +{ + struct config_dbus_core_hook *hook; + + if (bus_info.timer) { + TimerFree(bus_info.timer); + bus_info.timer = NULL; + } + + /* We should really have pre-disconnect hooks and run them here, for + * completeness. But then it gets awkward, given that you can't + * guarantee that they'll be called ... */ + if (bus_info.connection) + dbus_connection_unref(bus_info.connection); + + RemoveBlockAndWakeupHandlers(block_handler, wakeup_handler, &bus_info); + if (bus_info.fd != -1) + RemoveGeneralSocket(bus_info.fd); + bus_info.fd = -1; + bus_info.connection = NULL; + + for (hook = bus_info.hooks; hook; hook = hook->next) { + if (hook->disconnect) + hook->disconnect(hook->data); + } +} + +/** + * This is a filter, which only handles the disconnected signal, which + * doesn't go to the normal message handling function. This takes + * precedence over the message handling function, so have have to be + * careful to ignore anything we don't want to deal with here. + */ +static DBusHandlerResult +message_filter(DBusConnection *connection, DBusMessage *message, void *data) +{ + /* If we get disconnected, then take everything down, and attempt to + * reconnect immediately (assuming it's just a restart). The + * connection isn't valid at this point, so throw it out immediately. */ + if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, + "Disconnected")) { + DebugF("[config/dbus-core] disconnected from bus\n"); + bus_info.connection = NULL; + teardown(); + + if (bus_info.timer) + TimerFree(bus_info.timer); + bus_info.timer = TimerSet(NULL, 0, 1, reconnect_timer, NULL); + + return DBUS_HANDLER_RESULT_HANDLED; + } + + return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; +} + +/** + * Attempt to connect to the system bus, and set a filter to deal with + * disconnection (see message_filter above). + * + * @return 1 on success, 0 on failure. + */ +static int +connect_to_bus(void) +{ + DBusError error; + struct config_dbus_core_hook *hook; + + dbus_error_init(&error); + bus_info.connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error); + if (!bus_info.connection || dbus_error_is_set(&error)) { + DebugF("[config/dbus-core] error connecting to system bus: %s (%s)\n", + error.name, error.message); + goto err_begin; + } + + /* Thankyou. Really, thankyou. */ + dbus_connection_set_exit_on_disconnect(bus_info.connection, FALSE); + + if (!dbus_connection_get_unix_fd(bus_info.connection, &bus_info.fd)) { + ErrorF("[config/dbus-core] couldn't get fd for system bus\n"); + goto err_unref; + } + + if (!dbus_connection_add_filter(bus_info.connection, message_filter, + &bus_info, NULL)) { + ErrorF("[config/dbus-core] couldn't add filter: %s (%s)\n", error.name, + error.message); + goto err_fd; + } + + dbus_error_free(&error); + AddGeneralSocket(bus_info.fd); + + RegisterBlockAndWakeupHandlers(block_handler, wakeup_handler, &bus_info); + + for (hook = bus_info.hooks; hook; hook = hook->next) { + if (hook->connect) + hook->connect(bus_info.connection, hook->data); + } + + return 1; + +err_fd: + bus_info.fd = -1; +err_unref: + dbus_connection_unref(bus_info.connection); + bus_info.connection = NULL; +err_begin: + dbus_error_free(&error); + + return 0; +} + +static CARD32 +reconnect_timer(OsTimerPtr timer, CARD32 time, pointer arg) +{ + if (connect_to_bus()) { + TimerFree(bus_info.timer); + bus_info.timer = NULL; + return 0; + } + else { + return RECONNECT_DELAY; + } +} + +int +config_dbus_core_add_hook(struct config_dbus_core_hook *hook) +{ + struct config_dbus_core_hook **prev; + + for (prev = &bus_info.hooks; *prev; prev = &(*prev)->next) + ; + + hook->next = NULL; + *prev = hook; + + /* If we're already connected, call the connect hook. */ + if (bus_info.connection) + hook->connect(bus_info.connection, hook->data); + + return 1; +} + +void +config_dbus_core_remove_hook(struct config_dbus_core_hook *hook) +{ + struct config_dbus_core_hook **prev; + + for (prev = &bus_info.hooks; *prev; prev = &(*prev)->next) { + if (*prev == hook) { + *prev = hook->next; + break; + } + } +} + +int +config_dbus_core_init(void) +{ + memset(&bus_info, 0, sizeof(bus_info)); + bus_info.fd = -1; + bus_info.hooks = NULL; + bus_info.connection = NULL; + bus_info.timer = TimerSet(NULL, 0, 1, reconnect_timer, NULL); + + return 1; +} + +void +config_dbus_core_fini(void) +{ + teardown(); +} |